Orolia GSG-5 Series, User Manual With Scpi Manual, Page: 68 / 392

SBAS message files do not need to be transformed to the scenario date as all timing is rel-
ative, i.e. a message file downloaded for a particular date can be used also with any other
scenario start date.
ANTEX
You may also specify an ANTEX file to be used in simulation. The file extension is
.atx
. It
contains satellite antenna phase center offsets and phase center variations. When present,
this information is used for improving satellite range calculation.
Note: For GLONASS, matching ephemeris and almanac files must be spe-
cified (only the 2- line AGL format is supported, see ftp://ftp.glonass-
iac.ru/MCC/FORMAT/Format.agl ). In addition, GLONASS almanac files
must be named
*YYMMDD.agl
(i.e., a date must be provided at the end of
the file name).
Note: The GLONASS data at this publicly available FTP site is known to con-
tain errors. These can cause the GSG to generate signals that are deemed
‘bad’ by a receiver and may not be used in a fix or for navigation. This data is
not maintained by Orolia and is not guaranteed.
Note: The GPS and QZSS almanac files specified must comply with the
YUMA file format and match the first 5 characters exactly for field iden-
tification. The spacing to the rightmost column of data must be preserved.
If the file fails to be processed, verify that the Af0 and the Af1 lines do not
contain a space between these prefixes and the (s/s). For example, the line
must be
Af0(s/s)
, not
Af0 (s/s)
.
Note: RINEX data files in most cases must be full day files. However, when
GPS almanac files are provided, the RINEX records can be of shorter dur-
ation. RINEX files of less than a day duration without supporting GPS and
QZSS YUMA almanac files are limited to start times only after 1400 hours,
and may operate for limited times.
52 User Manual GSG-5/6 Series Rev. 27
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